Furnace-door frame.



L. S. SCHMIDT. FURNACE DOOR FRAME. APPLICATION msn ocr. 5, 191s.

Patented Jan. 9, 1917.

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glasses vals uns co pnamrumownuwcmv u c of Fig. 1.

'TINTE fs FFICE.

LAWRENCE S. SCHMIDT, OF PITTSBURGH,

MCCORMICK COMPANY, OF PITTSBURG PENNSYLVANIA.

PENNSYLVANIA, ASSIGNOR TO SCHMIDT- H, PENNSYLVANIA, A CORPORATION OF FURNACE-DOOR FRAME.

Specification of Letters Patent.

Patented Jan. 9, 1917.

Application led October 5, 1915. Serial No. 54,129.

To all whom t may concern Be it known that I, LAWRENCE S. SCHMIDT, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in F urance- Door Frames, of which the following 1s a specification.

This invention relates to improvements in furnace door frames, and more particularly to hollow water cooled door frames formed from sheet metal. l

The objects of my invention are to provide a door frame of this type which can be readily formed from sheet metal; which will .practically avoid the difficulties heretofore scribed, illustrated, and particularly pointed out in the appended claims.

In the accompanying drawings, in which similar reference characters indicate similar parts in each of the views, Figure 1 is a front elevation of a frame constructed in accordance with my invention, parts being Vbroken away to illustrate interior construction. Fig. '2 is a top plan view. Fig. 3 is a sectional view taken on line 3 3 of Fig. 1. Fig. 4 is a sectional view taken on line 4-4 F ig. 5 is a sectional view of a preferred form of wash-out valve. The frame of my invention is preferably constructed in sections A and B, each complete in'itself, the sections 'being substantially duplicates excepting that theyhave the right and left relation. Each section is formed of plates or sheets of metal and represents that part of the frame located on one side of a plane extending vertically through the center of the frame parallel to 'the frame side. For purposes of description, only one of the sections (A, for instance) is described in detail. f

The inner face of the section is formed by a ,plate 10 which is ianged outwardly as at water used in circulation,

any desired water circulation tion, the out-flow of the water being through the projecting portion, indicated at 10b, be-

ing adapted tobe secured to a buckstay of the furnace (not shown). The plate l0 is also flanged as at 10C, said latter fiange following the general contour of the section with the exception of the side 10a, and the top of the section which is closed by a separate plate.

The complemental plate of thesection is indicated at 11, this plate being flanged, as at 11a, in opposition to flange 10", the opposed edges of these flanges being united together by welding through the length of contact of these edges. The plate 11 is also welded 'to flange 10a, the plate being bent outwardly as at 11b in order to increase the distance from front to rear of the section adjacent the iiange 10a. This enlarged portion extends from top to bottom of the section, the wall 111 forming a guide for a vertically movable furnace door (not shown) which operates in connection with'the frame. As shown in Fig. l, the section comprises a body or head portion a and the jamb, cheek or leg a.

lThe top of the section is closed by a plate 12, which is preferably welded to plates 10 and 11 as indicated more particularly in Fig. 4; the top also extends over the enlarged portion heretofore referred to, see Fig. 2. As shown in Fig. 4, the top extends inwardly beyond the plane of plate 10, and is then bent upwardly, as at 12a, being provided with suitable bolt holes for a purpose presently described. The top preferably carries the inlet 13 and the outlet 14 for the the section having suitable water conducting pipes leading fromthe inlet for the purpose of producing within the secoutlet 14. Obviously, the piping employed may be varied to meet the conditions of service.

The jamb or cheek a is provided with a wash-out valve 15, particularly shown in Fig. 5, said valve device being in the form of a casing l5"1L threaded to plate 11 and designed to project inwardly into the interior of the section, the casing having openings 15b through its wall into the interior of the Vcasing at a point intermediate its ends. The

the section,

yhaving ai face vcomplemental to the seat.. The

valve 16'is also provided Vwith a depression 16a for the reception of, a key (not shown).

The valve is assembled by first placing the valve 1G in position, after which member 17 is placed in position and the key inserted 'into the depression 16a to rotate the valve so as to bring its face in contact with the seat 17a. lVith the parts in this position (the position shown in Fig. 5) leakage of water from the interior of the section will be prevented. When it is desired to provide a wash-out action, only the key is in sei-.ted through the opening in member 17 into the depression 16a and then turned to rotate the valve so as to cause the latter to recede Afrom its contact with the seat, whereupon, the water and collected matter will flow out through openings 15b and the interior of member 17.` This construction enables the frame to be washed out while the furnace is in operation, causing no delays or shut-downs. The particular advantage of this form of wash-out valve lies in the4 fact that there is an entire absence of projecting parts liable to be damaged by striking with the tool, etc., and, in addition, the requirement of the use of a special key for manipulating the valve, thus eliminating the possibility of accidental opening of the valve.

As shown in Fig. l, the two sections have the right and left relation, thus placing the guides 11b in position to perform their functions with respect to the door. As shown in Figs. 1, 2 and 3, the head or body portions of the sections have sides opposed to each other, and I prefer, in securing the frame in position, that these opposed sides of the sections be spaced slightly apart, thus permitting of the individual expansion and contraction of the sections without liability of distorting the frame, and especially without tendingrto cause the jambs or cheeks of Y the frame to be drawn toward each other,

a difliculty which has heretofore been present in frames of this character.

This construction alsoV does away with a cross connecting member" and its accompanying disadvantages. ln the present construction, by locating the lines of weld as shown, the effects of expansion and V contraction on the said welding lines of thesections is minimized; this effect is aided by the particular sectional formation of the frame which provides for the individual expansion and contraction of the sections. As pointed out, each section is preferably connected to a buckstay, the part 10 beingfpreferably holttogether and including a hollow jamb, a poi'- tion of the head or body, and aV door guide, said sections havingmeans adjacent the upper ends thereof for maintaining the sections in alineinent.

v2. A furnace door frame formed of independent vertically separableV sections, cach section comprising sheet metal plates welded together and Vincluding a hollow jamb, a poi'- tion of the head or body, and a door guide,

each section having an independent water circulating means, and connecting means ad-V jacent the tops of the sections for securing them together and maintaining the sections in alinement.

3. A furnace door frame comprising a pairof sections each of hollow sheet metal construction and comprising front, rear and top plates welded together, said sections each constituting4 a jamb and a portion of the head of the frame, each section having its front and rear plate flanged and disposed with the edges of the fianges abutting and tops 12 and the iianged pore,

Welded together, said iianges combinedly forming spaced welded walls in the head of the frame, the weld line of each of said walls being approximately equrdistant from the outer faces of the front and rear plates.

4. A furnace door frame comprising a pair of sections each of hollow sheet metal construction and comprising front, rear and top plates welded together, said sections each constituting a jamb and a portion of the head of the frame, each section having its front and rear plate flanged and disposed with the edges of the flanges abutting and welded together, said iianges combinedly forming spaced welded walls in the head of the frame, the weld line of each of Said walls being approximately equi-distant from the outer faces of the front and rear plates, and connecting means adjacent the tops of the sections for securing them together and maintaining the sections in alinement.

5. A furnace door frame comprising a hollow sheet metal structure having a head and depending jambs, the head portion being formed in two independent sections, each section having a top welded thereto, each top having a projecting flanged portion, anda member for .securing said projecting llanged portions, together in substantiallv longitudinal alinement.

6. A furnace door frame comprising a hollow sheet metal structure having a head and depending jambs, the head p ortion being formed in two independent sections, each section having a top welded thereto, each top having a projecting flanged portion, and a member for securing said projecting flanged portions together in substantially longitudinal alinement, said member being angular in cross section.

7. A furnace door frame comprising a hollow sheet metal structure having a head and depending jambe, the head portion being formed in two independent sections, each section having individual water circulating means, and an individual controllable drainage member for each section, said drainage member being located wholly within the plane of the section.

8. A furnace door frame comprising a hollow sheet metal structure having a head and depending jambs, the head portion being formed in two independent sections, each section having individual water circulating means, and an individual controllable drainage member for each section, said drainage member including a casing, and removable valve and valve carried by the casing.

In testimony whereof I affix my signature in presence of two witnesses.

LAWRENCE S. SCHMIDT.

glVitnesses ALEX. S. MABoN, W. G. DooLiTTLE.

Copies of this patent may be obtained for five cents each, by addressingrthe Commissioner of Patents, Washington, D. C.

seat members 

